In my experience there's absolutely no need to uninstall 3.6 and then install 10, as upgrading works fine from 3.6 to 10ESR, for example using this: <package id="firefox" name="Mozilla Firefox" revision="43" reboot="false" priority="20"> <variable name="version" value="10.0.4" /> <check type="uninstall" condition="exists" path="Mozilla Firefox %VERSION% (x86 en-GB)" /> <install cmd="%SOFTWARE%\firefox\Firefox Setup %VERSION%esr.exe -ms" /> <upgrade cmd="%SOFTWARE%\firefox\Firefox Setup %VERSION%esr.exe -ms" /> <remove cmd="%PROGRAMFILES%\Mozilla Firefox\uninstall\helper.exe -ms" /> </package> -- Pete Boyd thegoldenear.org openplanit.co.uk |